Hydraulic-pressure regulator



(E0 Model.)

J. s, MQDONALD.

HYDRAULIC PRESSURE REGULATOR. No. 292,026. Patented Jan. 15, 1884.

WITNE SSES v 1/63. v INVENTOR Z61c/k QM/M A Home y I N. PFIERS, Phcw-uxho m her. wuhin mn. n. c.

STATES ATENT Fries.

HYDRAULIC-PRESSURE REGULATOR.

SFECIFI CATION forming part of Letters Patent No. 292,026, dated January 15', 1884.

Application filed July 16, 1883.

(No model.)

DONALD, a resident of the city of New Orleans,

parish of Orleans, and State of Louisiana, have invented a certain new and useful Improvement in Hydraulic-Pressure Regulators; and

I do hereby declare the following to be a full, clear, and correct description of the same, reference being had to the annexed drawings, making a part of this specification.

This invent-ion relates to certain improvements in a pressure-regulator for which a patent, No. 128,235, dated June 25, 1872, was granted to me, and wherein a plunger is arranged within a chamber, said plunger being connected with the bearing block or cap of one of the rollers of a series, and the chamber is connected with stand-pipes, into which weighted plungers press upon the liquid contained in the above-described cylinder and stand-pipes and press downwardly upon the bearing block or cap and roller with a yielding pressure, depending upon the difference of area between the pressure-cylinder and stand-pipes, and upon the weight applied to the stand-pipe plungers.

The object of my invention is to provide means for regulating or relieving the pressure from the bearings of heavy rollers in sugarmills, to admit of their uninterrupted action without causing undue strain to be brought upon them when they are overfed or become choked by the pressure of unyielding sub stances between them.

The improvements consist in the peculiar construction and arrangement of a stand-pipe or accumulator, provided with guide-rods secured to its upper end, and a piston within the accumulator, acted upon in a direct ,manner by detachable weights, as will be hereinafter described.

The improvement further consists in the combination, with the accumulator or standpipe of a hydraulic regulator, of an oil or liquid reservoir connected to the supply-pipe of said accumulator, and a pump arranged between the reservoir and accumulator, to fill the latter with any required pressure of liquid,

or to reduce the pressure therein, or entirely exhaust the liquid from said accumulator, as will hereinafter appear.

Figure 1 in the accompanying drawings represents a view in elevation of my improved apparatus in connection with an ordinary cane-mill; Fig. 2 is a detail showing a top view of the cross-head of the accumulatorplunger. Fig. 3 is a front view of the detachable weights aud frame, and Fig. 4 is a crosssection through the line w w of Fig. 1.

To clearly illustrate the nature of my inven tion, the same is shown, as above stated, in connection with a cane-mill, which, in this instance, is provided with a train of three ro1lers, A- A A, arranged in triangular relation to each other, the roller A being arranged above and between the rollers A A and wherein said rollers are supported by housings B, in the usual manner. The upper roller, A, is provided with vertically-moving bearing blocks or caps C, that are held in place upon the upper side of the bearings at opposite ends of the roller, and are connected by housingbolts D D, arranged vertically and extending below the bed-plate E of the frame or housings. The bolts D D are connected at their lower ends by a crosshea d, F, with a cylindrical plunger, G, that is accurately turned to fit an opening in the head H of a hydraulic cylinder, H, and a packing, h, effectually pre= vents leakage or escape of the liquid from said cylinder. The cylinder H is of sufficient capacity to hold the quantity of liquid required to give the desired area of piston-surface and length of movement to the plunger to suit the pressure to which the roller is subjected and the distance it is to be separated from the other rollers. Apipe, I, of much smaller area than that of the cylinder H, connects said cylinder with the bottom of the stand-pipe or ELCCLlIIllllator K. A piston and rod, K, fit the interior of the stand-pipe, and the piston is raised by the pressure of the liquid beneath it, and depressed by detachable weights, any desired number of which are employed, as hereinafter described. Guide-rods K are secured to the head or cap of the stand-pipe, and project perpendieularly therefrom. Four guide-rods are preferably employed, and a spider or crosshead, it", having four guideways, may be employed to reciprocate upon the guide-rods. This cross-head is provided with side pins k k, (see Fig. 2,) from which are suspended a pair of rods, Z Z, the lower ends of which are secured to a cross-bar, 2*, that is provided with a hook, Z", for receiving a stand, Z, upon which any desired number of weights, Z, maybe placed. This arrangement provides simple and direct means for applying the power or weights immediately under the piston of the stand-pipe, and admits of the free movement of the piston within the cylinder at all times.

In order to regulate the amount of liquid within the cylinder and stand-pipe, to replace the liquid that may escape by leakage, or to entirely remove the liquid from the pressurecylinder or its connections, I employ a reservoir or chamber, L, connected at its upper end to the eduction-pipe m of a pump, M, the induction-pipe m of which is connected to the pipe I, connecting the accumulator and press- 11 re-eylind'er, so that the liquid therein may be readily pumped from said cylinder-pipe and accumulator and discharged into the reservoir L; Apipe, m connects the bottom of the reservoir with the pipe I, and a stop-cock, m,upon said pipe .permitsits passage to be opened or closed. Then the cock is opened, the oil in the reservoir will flow into the pressure-chamberandits connections, and will rise in the stand-pipeor accumulator to a level with the height .of .oil in the aforesaid reservoir.

The pump above described may be conveniently arranged for operation by bolting it to the stand-pipe or accumulator- WVhen water is employed as a liquid, it is important to remove said water to prevent rust, and also to prevent freezing when subjected to cold. Vhen oil is employed, it is often required to remove it for economic reasons.

I claim 1. The accumulator-head provided withthe perpendicular guide-rods, the vertically-moving piston, and the cross-head, in combination with the. rods Z 7/ and the removable weights for regulating the pressure'of the piston, substantially as described.

, 2. The hyclraulic-pressure regulator herein described, consisting of the liquid-pressure cylinder and accumulator, in combination with a reservoir, L, pump M, and pipes connecting said reservoir with the pressure-cylinder and accumulator, said parts being arranged substantial] y as described, and for the purpose set .forth. 

